372 HYMENOPTEKA. 



finely punctured, the punctures hidden by the pile ; sides of the front aciculated, the 

 centre depressed and with an obscure furrow. Abdomen not much longer than the 

 head and thorax united; coarsely punctured throughout. Petiole with the central 

 part widened towards the apex ; inner furrow wide, the outer one not half its width. 

 Second segment with a sharp keel running down the centre, the keel issuing from a 

 4-angled area at the base ; the lateral depression sharply oblique, wide and deep, and 

 not reaching to the middle. Suturiform articulation wide, strongly longitudinally 

 striated ; the second articulation scarcely so wide, but deeper, the third articulation 

 narrower and scarcely as deep. 



62. Iphiaulax rixosus. 



Niger, abdominis segmentis l°-6 m ferrugineis ; alis fuscis. $ . 

 Long. 10 millim. ; terebra 8 millim. 



Eab. Nicaragua, Chontales (Janson). 



Antennae stout, microscopically pilose; basal joint short, thick, of equal width. 

 Face coarsely punctured, projecting in front of the eyes, covered with short white hair ; 

 front a little depressed in the middle, and without a furrow in the centre. Abdomen 

 nearly twice the length of the thorax, becoming gradually wider towards the middle, 

 and thence to the apex narrowed; coarsely punctured all over. Petiole with the 

 central part broad, and not much enlarged towards the apex ; the inner furrow wide r 

 shallow, and finely and closely punctured, the outer furrow a little narrower. Second 

 segment with a triangular area in the centre at the base, the area continued as a keel 

 nearly to the apex ; the lateral depression wide, deep, oblique. Suturiform articulation 

 wide, curved, the branches issuing not far from the side ; finely punctured ; the second 

 and third articulations of nearly equal width. 



y\63. Iphiaulax egregius. 



Niger, linea pronoti, lineis 2 mesonoti, trochanteribus ex parte, geniculis abdominisque segmentis l°-5 m rufo- 



ferrugineis : alis fumatis, stigmate fusco. c? • 

 Long. 8 millim. 



Hah. Mexico, Presidio (Forrer). 



Antennae a little longer than the body, densely covered with a whitish pile; the 

 scape more shining and more sparsely clothed with hair; its basal joint as long as the 

 third and fourth joints together, not produced at the apex, and of nearly equal width 

 throughout. Head densely covered with long white stiff hair ; the face apparently 

 punctured ; front and vertex shining, impunctate, the former depressed in the middle, 

 but not deeply so. Thorax thickly covered (especially on the sides) with long white 

 hair; shining, impunctate. Abdomen longer than the head and thorax together. 

 Petiole with the apical part of the central division rounded, rugose ; the inner furrow 



